As you might already know, Runlevels are replaced with Systemd targets in many recent Linux distributions like RHEL 7 and Ubuntu 16.04 LTS. For more details about runlevels and systemd target, refer this guide. In...

A runlevel is one of the modes that a Unix-based operating system will run in. In Linux Kernel, there are 7 runlevels exists, starting from 0 to 6. The system can be booted into only one runlevel at...